Getting that out of the way, there's still a flaw in your argument, though it's not surprising.
Say this gets enforced and allll those bad people who give rep to negate someone else's neg rep are actually being punished.
Well, what if someone who doesn't know that the other person has neg rep and reps them anyway, and by mistake they get punished for it?
How do you then solve that? Well, one way would be to talk to the moderator, or make a thread in admin contact, whichever would be your preference. But the only problem with that is that people who do it on purpose could do that too. It's entirely possible for someone to lie about it if they disguised it well enough.
Um, I don't know what the other guy thinks, but your missing the point.
You can give rep to people with neg rep. Just don't do it purely because they have neg rep.
As for punishment, it is rather hard to see. But, as I said COUNTLESS FREAKING TIMES with a moderator to neg repped people ratio of a bout 20 to 15, all it takes is a few of the mods to check there own specific person once a day. If they have any new rep, find out why. All it takes is about 45 seconds of their time.
Yes, they could lie. But, that doesn't mean we shouldn't enforce it. Obviously, fear of punishment comes into play here. Sure, we won't get ALL of them, but at least we made a lasting effect. Banning is obviously going to extremes, but we could start out with....Ah screw it. I already wrote all of this at least 3 times. Just go back to my first post here. It pretty much fixes everything. I don't understand why this thread is still up.
Lastly, quit telling the other guy he is trolling. Pointing it out in his own thread, in public, is childish and stupid. If you feel that he is really crossing the line, then go to the admins. Don't trash up his name here. Telling someone else he is a troll in public to make him look bad is trolling.
Avator: Stop it. This is a debate. Not a drama house. You show absolutely no respect for the posters here. They have opinions as well. Play nice or don't play at all.